// Rademaker Robin - Array practice in C++ Part 2 - 15/O3/2019 // [4] Multi-dimensional array with diagonal sum // Check part 1 before this. #include #include // for manipulating output using namespace std; int main() { // [4] Multi-dimensional array with 3 rows and 3 columns // Array indexes [0][0], [1][1], [2][2] will be count together // which is diagonal from top-left to bottom-right. // we can also do diagonal from bottom-left to top-right // Array indexes [0][2], [1][1], [2][2] will be count together. /* top-left: top-right: [5] 2 3 5 2 [3] 4 [5] 3 4 [5] 3 2 4 [5] [2] 4 5 */ // extra row for storing diagonal results int myArray4[4][3] = {{2,2,2}, {5,5,5},{10,10,10}}; cout << "\n\n"; cout << "[4] Multi-dimensional array with diagonal sum:"; cout << "\n\n"; // count3 is used to write Row 1,2,3 int count3 = 1; int tl2br; // top-left to bottom-right int bl2tr; // bottom-left to top-right // We use 2 for loops // LOOP for ROWS for(int i = 0; i < 3; i++){ cout << "Row " << count3 << ": "; // LOOP for COLUMNS for(int x = 0; x < 3 ; x++){ // cout.fill('0'); indicates that a 0 has to be added // to get at least 2 numbers we use setw(2) // #include is added on top for this cout.fill('0'); cout << setw(2) << myArray4[i][x] << " "; } // END LOOP for COLUMNS // new line next row // Row count cout << endl; count3++; } // END LOOP for ROWS // Now lets count up int r = 2; //0,1,2 = 3 for(int i = 0; i < 3; i++){ // this adds up the diagonals top-left to bottom-right myArray4[3][0] += myArray4[i][i]; // this adds up the diagonals bottom-left top-right myArray4[3][1] += myArray4[r-i][i]; } // END LOOP cout << "\n\n" << "SUM Top-left to bottom-right: " << myArray4[3][0] << endl << "SUM Bottom-left to Top-right " << myArray4[3][1] << "\n\n"; return 0; }

Cpp - Array practice in C++ part2